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  <title>字体微调</title>
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<p class="p_Normal">字体微调(Hints)是内置在轮廓(outline)字体中的指令，可以使字符形状，尤其是以小磅值和低分辨率打印的细微曲线，尽可能接近所设计的字符形状。TrueType 字体包含复杂的字体微调(hinting)信息。TrueType 字体可以对每个字符、不同大小的字符和旋转文本进行字体微调(hint)。</p>
<p class="p_Normal">在最基本的层面上，字体微调 hinting (或更准确地说，指示 instructing)是一种精确定义哪些像素被打开的方法，以便在小尺寸和低分辨率下创建尽可能好的字符位图形状。由于是字形的轮廓决定了哪些像素将构成所给定大小的字符位图，因此通常需要修改轮廓以创建合适的位图图像；实际上就是修改轮廓，直到打开所需的像素组合。字体微调是添加到字体中的数学指令，用于在特定大小条件下对字符轮廓进行变形。从技术上讲，在轮廓被扫描转换之前，字体微调会引起修改轮廓线(contour)缩放控制点坐标的操作。</p>
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